The access token is the same as the provider's access token.
curl --location --request POST 'https/omerlo.com/api/media/v1/oauth/token?client_id=87b65904-e1f7-45e5-9fa0-40cbea12a8c1&code=<authorization-code>&redirect_uri=https://acme.com/callback&oauth_provider_id=f315097b-83a8-4d21-916f-33801b867b5b&grand_type='{
"scope": "user",
"access_token": "<access-token>",
"refresh_token": "<refresh-token>",
"expires_in": 3600,
"token_type": "Bearer"
}